An array of objects that define plain string or regex patterns to match against the users input. When a match is found, the output object is returned. | Name | Type | Default | Description | |:|:--|:--|:--| | expressionsRequired | object[] | - | An array of objects that accept the [expressions Parameters](#expressions-parameters). | ## **expressions Parameters** | Parameter | Type | Default | Description | |:--|:|:--|:| | stringRequired | string | - | The actual input or value from the user or system. | | patternRequired | string | - | A regular expression pattern to validate or match the string. | | [output](./data_map.output.mdx)Required | object | - | Defines the response or action to be taken when the pattern matches. | ## Example yaml andJSON expressions: - string: starwars pattern: (?i)star\\s*wars output: response: May the Force be with you! - string: startrek pattern: (?i)star\\s*trek output: response: Live long and prosper!